Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the behavioral burden. It does add meaningful qualifiers: the configuration returned is 'effective' (resolved) and 'sanitized' (redacted), which is useful. However, it does not explicitly state read-only behavior, failure modes, or what sanitization removes, so the disclosure is only moderately complete.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.